package com.andy.controller.interceptor;

import org.apache.commons.lang3.StringUtils;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@Component
public class LoginCheckInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        System.out.println("====>>>>LoginCheckInterceptor.preHandle......");
        String requestURI = request.getRequestURI();
        System.out.println("requestURI: "+requestURI);

        String sessionUsername = (String) request.getSession().getAttribute("session_username");
        if (StringUtils.isBlank(sessionUsername)) {
            response.sendRedirect("/");//跳到登录页面
            return false;
        }

        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {

    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {

    }
}
